drivers/pcmcia/sa1100_cerf.c

   1 /*
   2  * drivers/pcmcia/sa1100_cerf.c
   3  *
   4  * PCMCIA implementation routines for CerfBoard
   5  * Based off the Assabet.
   6  *
   7  */
   8 #include <linux/module.h>
   9 #include <linux/kernel.h>
  10 #include <linux/device.h>
  11 #include <linux/init.h>
  12 #include <linux/delay.h>
  13
  14 #include <mach/hardware.h>
  15 #include <asm/mach-types.h>
  16 #include <asm/irq.h>
  17 #include <mach/cerf.h>
  18 #include "sa1100_generic.h"
  19
  20 #define CERF_SOCKET     1
  21
  22 static struct pcmcia_irqs irqs[] = {
  23         { CERF_SOCKET, CERF_IRQ_GPIO_CF_CD,   "CF_CD"   },
  24         { CERF_SOCKET, CERF_IRQ_GPIO_CF_BVD2, "CF_BVD2" },
  25         { CERF_SOCKET, CERF_IRQ_GPIO_CF_BVD1, "CF_BVD1" }
  26 };
  27
  28 static int cerf_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  29 {
  30         skt->irq = CERF_IRQ_GPIO_CF_IRQ;
  31
  32         return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
  33 }
  34
  35 static void cerf_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  36 {
  37         soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
  38 }
  39
  40 static void
  41 cerf_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
  42 {
  43         unsigned long levels = GPLR;
  44
  45         state->detect   = (levels & CERF_GPIO_CF_CD)  ?0:1;
  46         state->ready    = (levels & CERF_GPIO_CF_IRQ) ?1:0;
  47         state->bvd1     = (levels & CERF_GPIO_CF_BVD1)?1:0;
  48         state->bvd2     = (levels & CERF_GPIO_CF_BVD2)?1:0;
  49         state->wrprot   = 0;
  50         state->vs_3v    = 1;
  51         state->vs_Xv    = 0;
  52 }
  53
  54 static int
  55 cerf_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  56                              const socket_state_t *state)
  57 {
  58         switch (state->Vcc) {
  59         case 0:
  60         case 50:
  61         case 33:
  62                 break;
  63
  64         default:
  65                 printk(KERN_ERR "%s(): unrecognized Vcc %u\n",
  66                         __func__, state->Vcc);
  67                 return -1;
  68         }
  69
  70         if (state->flags & SS_RESET) {
  71                 GPSR = CERF_GPIO_CF_RESET;
  72         } else {
  73                 GPCR = CERF_GPIO_CF_RESET;
  74         }
  75
  76         return 0;
  77 }
  78
  79 static void cerf_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
  80 {
  81         soc_pcmcia_enable_irqs(skt, irqs, ARRAY_SIZE(irqs));
  82 }
  83
  84 static void cerf_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
  85 {
  86         soc_pcmcia_disable_irqs(skt, irqs, ARRAY_SIZE(irqs));
  87 }
  88
  89 static struct pcmcia_low_level cerf_pcmcia_ops = {
  90         .owner                  = THIS_MODULE,
  91         .hw_init                = cerf_pcmcia_hw_init,
  92         .hw_shutdown            = cerf_pcmcia_hw_shutdown,
  93         .socket_state           = cerf_pcmcia_socket_state,
  94         .configure_socket       = cerf_pcmcia_configure_socket,
  95
  96         .socket_init            = cerf_pcmcia_socket_init,
  97         .socket_suspend         = cerf_pcmcia_socket_suspend,
  98 };
  99
 100 int __init pcmcia_cerf_init(struct device *dev)
 101 {
 102         int ret = -ENODEV;
 103
 104         if (machine_is_cerf())
 105                 ret = sa11xx_drv_pcmcia_probe(dev, &cerf_pcmcia_ops, CERF_SOCKET, 1);
 106
 107         return ret;
 108 }